Thanks for your com­ment. I in­tend the idea as a prin­ci­ple to be taken into ac­count when de­sign­ing cog­ni­tive frame­works, not as a spe­cific pro­ject. Many (not all) ideas are un­nec­es­sar­ily com­pli­cated so there are lots of ad­van­tages of sim­plify­ing them, or tack­ling prob­lems via an al­ter­na­tive route. But to the best of my knowl­edge this is not some­thing that any­one has looked at sys­tem­at­i­cally. I don’t know much about stack overflow but will look into it.

Fair com­ment. The 50% busi­ness was just a hy­po­thet­i­cal thought ex­per­i­ment to illus­trate a pos­si­bil­ity, not a figure with any ev­i­dence be­hind it! But I do think that the prob­lem of knowl­edge get­ting more and more com­pli­cated is a se­ri­ous prob­lem and will be­come more so in the fu­ture. If peo­ple can’t see what’s go­ing on, fake news will thrive.

Very in­ter­est­ing in lots of ways. Hippo sounds a bit like Brave New World to me, which isn’t en­tirely to knock it, but I wouldn’t like an app to be in charge of my mood! On the de­vel­op­ment front ap­pin­ven­tor.mit.edu is a very flex­ible (and brilli­ant and pow­er­ful) tool for novices to pro­gram an­droid apps. I sus­pect that pro­duc­ing a work­ing ver­sion your­self might have avoided many of your prob­lems. I got into ap­pin­ven­tor be­cause I wanted to pro­duce an app to mon­i­tor health symp­toms, mood, ac­tivity etc at ran­dom times. (Mine has a gong not a ping.) I’ve sort of suc­ceeded but, as of­ten hap­pens I think, I’m now us­ing the app I made for some­thing rather differ­ent, but am re­design­ing and ex­tend­ing the origi­nal idea.